NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 605
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-12-29 | 605-592-3XXX | 3000–3999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - SD | 920F | BROOKINGS | SD |
| 2016-12-13 | 605-560-1XXX | 1000–1999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - SD | 920F | BROOKINGSR | SD |
| 2010-08-06 | 605-304-1XXX | 1000–1999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - SD | 920F | WHITE | SD |
| 2010-08-06 | 605-414-1XXX | 1000–1999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - SD | 920F | CASTLEWOOD | SD |
| 2010-08-06 | 605-686-1XXX | 1000–1999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - SD | 920F | ESTELLINE | SD |
| 2010-08-06 | 605-710-1XXX | 1000–1999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - SD | 920F | LAKENORDEN | SD |
| 2010-08-06 | 605-792-1XXX | 1000–1999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - SD | 920F | HAYTI | SD |
| 2010-08-06 | 605-922-1XXX | 1000–1999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - SD | 920F | ELKTON | SD |
| 2010-07-13 | 605-534-6XXX | 6000–6999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - SD | 920F | FLANDREAU | SD |
| 2010-07-13 | 605-627-3XXX | 3000–3999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - SD | 920F | VOLGA | SD |
| 2010-07-13 | 605-854-6XXX | 6000–6999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - SD | 920F | DE SMET | SD |
| 2010-07-13 | 605-983-0XXX | 0000–0999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - SD | 920F | ARLINGTON | SD |
| 2010-07-13 | 605-997-8XXX | 8000–8999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - SD | 920F | FLANDREAU | SD |
| 2010-07-12 | 605-592-9XXX | 9000–9999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - SD | 920F | BROOKINGS | SD |
| 2010-06-28 | 605-632-1XXX | 1000–1999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - SD | 920F | LK PRESTON | SD |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.